Malicious PDF — malware analysis report

Static analysis result for SHA-256 295bc189b3c90d6b…

MALICIOUS

PDF

73.9 KB Created: 2021-09-17 03:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bba3a2d5366bf1446daf69c247a5f0e3 SHA-1: 2a7fa0c475ef53be5feb321ce67a397f039800e2 SHA-256: 295bc189b3c90d6b30c411d4103e44a4a39a4497d42c661fc91c484496e2ba3d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites, potentially via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ketchas.ru/uplcv?utm_term=fut+draft+20+mod+apk PDF link annotation
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/6egbjbmtd48c1c436n4kjjsa86/42440737636.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/nalenawixo.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/gumogupubuzonapuxo.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/pibepen.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/rifonunupu.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/bedafezexatijavig.pdfIn PDF document text
    • https://2acontractor.it/images/file/lidapiwi.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/17713708718.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/49762974095.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/62856351792.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/83231631729.pdfIn PDF document text
    • http://ortosprendimai.lt/userfiles/file/fidagejoripol.pdfIn PDF document text
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/48192164346.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/tovufijawomozajejisu.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143bd67c074d---14204655764.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/74105340054.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/23437800943.pdfIn PDF document text
    • http://roseeskin.com/userfiles/file/20210915195413.pdfIn PDF document text
    • http://topbuild.net/content/xuploadimages/file/92193012237.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/goluwa.pdfIn PDF document text
    • http://taigesw.com/upload/files/32250013141.pdfIn PDF document text
    • http://marjoleintje.nl/include/userfiles/73654965432.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/fodoxabewivixena.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDE 10528 bytes
SHA-256: 209c1902460ab192caba4c4938277b131d71a088b538698310af1573a863abee
font_01_sfnt_off0000d7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E0 16488 bytes
SHA-256: 86c34fdfcd644ce1b065642585eef6dda8035212a6d6829f06905f128b94dd05
font_02_sfnt_off000101ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1